22.3KW Self install complete, $1.25/W!

[JFinch57]

I wouldn't (and didn't)

If everything works - great.
If there's a problem - how do you deal with warranty issues?
Why is it being sold on e-bay? Is it refurbished? Other issues?

For me the risk wasn't worth the reward.

Enphase uses the date the inverter first reports for the warranty start. There are many reputable sellers on eBay, and the panels are also warrantied by the manufacturer. I bought panels from the same guy 3 times, and it's a real solar company. The Square D 200A outdoor 40 slot load center normally goes for over $600, and I got it for less than $200. Do the math, if it fails and the manufacturer won't honor the warranty then buy another one, you're still way ahead of the game!